CN106031823B - A kind of table tennis intelligence score system and scoring system - Google Patents
A kind of table tennis intelligence score system and scoring system Download PDFInfo
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- CN106031823B CN106031823B CN201510109543.1A CN201510109543A CN106031823B CN 106031823 B CN106031823 B CN 106031823B CN 201510109543 A CN201510109543 A CN 201510109543A CN 106031823 B CN106031823 B CN 106031823B
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Abstract
This application discloses a kind of table tennis intelligence score system and scoring systems, the system includes high speed camera, capture card, capturing card driver and score-module, the capture card and capturing card driver are exported to the real-time image information of fixation frame per second for obtaining high speed camera to score-module, whether score-module identification table tennis direction and motion state terminate and score to judge local exchange, the motion state include whether to beat on the table, whether beat it is online, whether out-of-bounds, sportsman receive and whether smooth cross net.By means of the above-mentioned technical proposal of the present invention, it can more accurately realize the every innings of victory or defeat of table tennis real-time judge and record present score result.
Description
Technical field
This application involves a kind of table tennis intelligence score system and scoring systems.
Background technology
Table tennis is the people's favorite type games extensively, during playing ball at present or third party is needed to do
Judge simultaneously is responsible for scoring or the both sides that need to play ball voluntarily remember present score.It lives for the amateurish table tennis of many masses' properties
Dynamic, player need not will not also go for a special judge, but every innings all by itself judging victory or defeat, and remember currently to compare
Divide result.But in this case, it can cause player that cannot attentively put into match, and with the extension of movement, the both sides that play ball have
Probably due to obscure score and cause a dispute.Therefore a kind of device and method are needed in table tennis activity of a mass character, it can not
Need any human intervention simultaneously can every innings of automatic decision victory or defeat, and log history score.
Invention content
The purpose of the present invention is to provide a kind of table tennis intelligence score system and scoring system, to overcome existing skill
Deficiency in art.
To achieve the above object, the present invention provides following technical solution：
The embodiment of the present application discloses a kind of table tennis intelligence score system, including high speed camera, capture card, acquisition
Card driving and score-module, the capture card and capturing card driver are to the realtime graphic of fixation frame per second that obtains high speed camera
Information is exported to score-module, and the score-module identifies table tennis direction and motion state to judge whether local exchange is tied
Beam is simultaneously scored, the motion state include whether to beat on the table, whether beat it is online, whether out-of-bounds, sportsman whether
Receive and whether it is smooth cross net.
Preferably, in above-mentioned table tennis intelligence score system, the score-module includes judging a ball left side respectively
Whether beaten in right motion process on the table, whether beat it is online, whether out-of-bounds, whether smooth cross net, whether in other side's desktop
Smoothly rebound, whether other side receives, whether other side is connected to ball and other side whether the submodule for returning ball.
Disclosed herein as well is a kind of scoring systems of table tennis intelligence score system, will be vertical where ping-pong table
Space is divided into D1 areas, D2 areas, D3 areas and D4 areas, and the D3 areas and D4 areas are located at the left and right sides in the D2 areas respectively, described
D2 areas are located at the centre position of the ball table, and the D1 areas are between the D3 areas and D4 areas and positioned at the left and right in the D2 areas
Both sides, the D1 areas include being located at D1_L areas and the D1_R areas at left and right sides of the D2 areas respectively, and the scoring system includes step
Suddenly：
Step 401, to image inter-frame difference in D1 areas, then thresholding, enters step 402；
Step 402, it detects and obtains the foreground area in D1_L and D1_R, there is prospect then to enter step 403, otherwise fall back on
Step 401；
Step 403, according to the position of previous step prospect, the movement window of ball is established, enters step 404；
Step 404, inter-frame difference is carried out to input picture in movement window, subsequently into step 405；
Step 405, if there was only ball, the coordinate up and down of direct coverage motion window calculation ball in movement window；
If there is the interference of racket or human body in movement window, calculated in coverage motion window close to the part region of ball
The coordinate up and down of ball, subsequently into step 406；
Step 406, judge it is to be located at D1_L or D1_R when ball occurs for the first time；D1_L is appeared in for the first time then enters step
Rapid 408, on the contrary 407 are entered step, the judgement of local exchange victory or defeat is completed in process steps 407 or step 408, subsequently into step
409；
Step 407, ball moves from right to left, performs following steps and judges：
Stage4, judges whether ball is beaten on the desktop of right side, terminates local exchange if having got to；Judge whether ball is beaten in net
On, terminate local exchange if having got to；Judge ball whether right side out-of-bounds, terminate local exchange if out-of-bounds；Judge the whether smooth mistake of ball
Net enters stage5 if smooth net excessively,
In Stage5, judge that ball whether in left side out-of-bounds, terminates local exchange if out-of-bounds；Judge whether ball is smooth in left side
Rebound enters stage6 if smooth rebound,
In Stage6, judge whether other side receives, if not connecing, club repeatedly bounces, then terminates local exchange；Whether judge other side
Ball is connected to, terminates local exchange if middle ball is not connect；Judge whether other side returns ball, successfully return, enter step in 408
stage1；
Step 408, ball moves from left to right, performs following steps and judges：
Stage1, judges whether ball is beaten on the desktop of left side, terminates local exchange if having got to；Judge whether ball is beaten in net
On, terminate local exchange if having got to；Judge ball whether left side out-of-bounds, terminate local exchange if out-of-bounds；Judge the whether smooth mistake of ball
Net enters stage2 if smooth net excessively,
In stage2, judge that ball whether in right side out-of-bounds, terminates local exchange if out-of-bounds；Judge whether ball is smooth on right side
Rebound enters stage3 if smooth rebound,
In stage3, judge whether other side receives, if not connecing, club repeatedly bounces, then terminates local exchange；Whether judge other side
Ball is connected to, terminates local exchange if middle ball is not connect；Judge whether other side returns ball, successfully return, enter step in 407
stage4；
Step 409, some foreground point in current frame window come update next frame movement window center, specifically
Ground, in stage1, using the coordinate of rightmost side foreground point in current frame window as the center of next frame window；Stage2 and
In stage3, if racket does not enter window, using the coordinate of rightmost side foreground point in current frame window as next frame window in
The heart, if racket enters window, using the coordinate of leftmost side foreground point in current frame window as the center of next frame window, Stage4
Window update mode and stage1 to stage3 to stage6 is opposite.
Preferably, in the scoring system of above-mentioned table tennis intelligence score system, in the step 403, ball
Movement window is the rectangular image area of the movement with ball and movement.
Further, the movement window of ball is defined as：Centered on ball, the wide a height of 8d of *Ball×10·dBallRectangular image
Region, wherein dBallDiameter pixel number for the table tennis in image.
Compared with prior art, the advantage of the invention is that：It, can be than calibrated by means of the above-mentioned technical proposal of the present invention
True every innings of victory or defeat of realization table tennis real-time judge simultaneously records present score result.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or it will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 show in the specific embodiment of the invention relative position figure between camera and ball table；
Fig. 2 show the principle schematic of table tennis intelligence score system in the specific embodiment of the invention；
Fig. 3 show the principle schematic of table tennis intelligence scoring system in the specific embodiment of the invention；
Fig. 4 show the algorithm flow chart of table tennis intelligence scoring system in the specific embodiment of the invention；
Fig. 5 show the workflow of each submodule in table tennis intelligence score system in the specific embodiment of the invention
Figure；
Fig. 6 show the division schematic diagram of ball table specific region position in actual work；
Fig. 7 show schematic diagram during application work in the embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawings to the specific reality of the present invention
The mode of applying is described in detail.The example of these preferred embodiments is illustrated in the accompanying drawings.Shown in attached drawing and according to
The embodiments of the present invention of attached drawing description are only exemplary, and the present invention is not limited to these embodiments.
Here, it should also be noted that, in order to avoid because having obscured the present invention during unnecessary details, in the accompanying drawings only
It shows the structure and/or processing step closely related with scheme according to the present invention, and is omitted little with relationship of the present invention
Other details.
The embodiment of the present invention provides a kind of device and method of the table tennis intelligence score system based on high speed camera.
Such as Fig. 2, the complete system of the embodiment of the present invention (is scored including high speed camera, capture card, capturing card driver and application program of scoring
Module) four parts.During specific works, such as Fig. 1 is placed around a high-speed camera in ping-pong table flanking central position first
Machine obtains the sport video of high frame per second by capture card and its host computer driving, finally every by application program real-time judge of scoring
The victory or defeat of office simultaneously records present score result.
High speed camera, capture card and capturing card driver are responsible for providing regarding in real time for fixed frame per second to upper strata application program of scoring
Frequently.
The definition of foreground moving window (move window) is introduced below.As shown in figure 3, the movement window of ball is defined as：
Centered on ball, wide x high is about 8dBall×10·dBallAnd the movement with ball and the rectangular image area of movement.Wherein dBall
Diameter pixel number for the table tennis in image.
After defining and establishing movement window in the picture, the image procossings such as image difference later and position coordinates extract
Method need to only be calculated in this window, so as to substantially reduce calculation amount, facilitate realization view synthesis.In addition, table tennis
Racket illustrates racket Grounding, can record ball present position whereby once entering movement window, later in several frames etc.
It treats whether ball crosses this position again, ball is returned so as to judge whether other side is successful.Specifically, when other side is connected to ball
When, institute's record position before the prospect in window will necessarily cross；If other side is not connected to ball, moving the more new algorithm of window can protect
Card movement window is rested at human region, institute's record position before will not being crossed so as to the prospect in window, so as to judge
Victory or defeat.
Application program of scoring judges every innings of victory or defeat by analyzing ball in real time relative to the change in location of ball table.Specifically
Ground, shown in the ping-pong table in Fig. 6, to mark 4 regions, D1 areas in the picture first：Service judges area, D2 areas：Net is crossed to sentence
Disconnected area, D3 areas：Left side rebound area, D4 areas：Right side rebound area.Wherein, D1 divides into D1_L and D1_R.Based on opencv, program
Inter-frame difference first is carried out to input picture, obtains sport foreground, according still further to the flow of Fig. 3, in window is moved before real-time judge
The size and location of scape change to judge every innings of victory or defeat.
Specifically, after ball, which first enters service, judges area (D1 areas), what it is according to entrance is that D1_L or D1_R judges hair
Ball side；Current office formally starts at this time.Then ball entered barrier (D2 areas).Within 10 frames (empirical value, it is practical to regard concrete condition
Depending on) or ball ran out of barrier or hit net；Then ball enters rebound area (D3 or D4 areas), otherwise ball is run out of within 10 frames
Rebound area or no play；Then it waits for other side that ball is returned, there is 2 kinds of situations at this time：Ball is returned, other side misses the target.Work as fortune
When the size of prospect is more than a certain threshold value in dynamic window, it is believed that racket sufficiently closes to ball, record ball position at this time.20 frames
Within (empirical value is actually determined on a case-by-case basis), if second of position for getting over overwriting of ball, ball is returned, otherwise right
Side misses the target.Then, ball was again introduced into barrier, rebound area, until being returned again.After beginning, unless judging current office
Otherwise victory or defeat is gone down repeatedly by above-mentioned flow.
Fig. 3 is scoring algorithm schematic diagram.In figure, table tennis scoring algorithm is divided into 6 stages, respectively in corresponding diagram 3
Stage1~stage6.
Stage1 expressions are hit back from left side ball, until ball is just passed through the process in the region at net place.Specifically, herein
In the stage, there are four types of situations (Fig. 5).Situation one：Ball has been got on the desktop of left side；Situation two：Ball is got on the net；Situation three：Ball exists
Side out-of-bounds；Situation four：Ball is smooth to cross net.The judgment mode of situation one is before over the net, and ordinate enters D3 areas；Feelings
The judgment mode of condition two is since ball has just enter into D2 areas, and ball is not passed through D2 areas within 10 frames later；The judgement side of situation three
Formula is before over the net, and ordinate enters D3 areas, does not have the ordinate of rebound or ball to be less than ball table height within 10 frames
Or ball is blocked by ball table and becomes very little；The judgment mode of situation four is since ball has just enter into D2 areas, later within 10 frames
Ball has passed through D2 areas.Situation one occurs to situation three, and local exchange terminates, and situation four occurs, and the stage1 stages terminate, and enters
The stage2 stages.
After stage2 represents that ball crosses net from left side, until ball is just in the process of D4 areas rebound.Specifically, in this stage,
There are two kinds of situations (Fig. 5).Situation one：Ball is in right side out-of-bounds；Situation two：Ball smoothly rebounds on right side.The judgment mode of situation one
For before working as ball completion rebound, less than ball table height, either ball by ball table is blocked and becomes very little or ball horizontal seat the ordinate of ball
Mark is more than the ball table rightmost side；The judgment mode of situation two is since ball has just enter into D4 areas, and ball is located at D4 areas within 15 frames later
On.Situation one occurs, and local exchange terminates, and situation two occurs, and the stage2 stages terminate, into the stage3 stages.
After stage3 represents that ball just completes rebound on right side, until the process that ball has just been returned by other side.Specifically, in this rank
Section, there are three types of situations (Fig. 5).Situation one：Other side does not connect；Situation two：During other side does not connect；Situation three：Other side smoothly returns ball.
The judgment mode of situation one enters D4 areas for ball；For situation two and situation three, write down when racket enters movement window and (pass through fortune
The range size of dynamic window prospect judges) ball position, ball does not cross this position and then thinks to send out again within 20 frames later
Raw situation two is otherwise it is assumed that a situation arises three.
The process of Stage4 to stage6 is similar with the process of stage1 to stage3, repeats no more.
Fig. 4 is table tennis scoring algorithm flow chart.
Specifically, in step 401, to image inter-frame difference in D1 areas, then thresholding, enters step 402；
In step 402, detect and obtain the foreground area in D1_L and D1_R.There is prospect then to enter step 403；Otherwise it moves back
To step 401；
In step 403, according to the position of previous step prospect, the movement window of ball is established.Enter step 404；
In step 404, inter-frame difference is carried out to input picture in movement window, subsequently into step 405；
In step 405, if only ball, the seat up and down of direct coverage motion window calculation ball in movement window
Mark；If there is the interference of racket or human body in movement window, come in coverage motion window close to the part region of ball
Calculate the coordinate up and down of ball.Subsequently into step 406；
In step 406, judge it is to be located at D1_L or D1_R when ball occurs for the first time；For the first time D1_L is appeared in then to enter
Step 408 (calling process A), on the contrary enter step 407 (calling process B).The flow of process A is as shown in Figure 3.Process B and mistake
Journey A is similar.The judgement of local exchange victory or defeat is finally completed in process A or B, subsequently into step 409；
In step 409, some foreground point in current frame window updates the center of next frame movement window.Specifically
Ground, in stage1, using the coordinate of rightmost side foreground point in current frame window as the center of next frame window；Stage2 and
In stage3, if racket does not enter window, using the coordinate of rightmost side foreground point in current frame window as next frame window in
The heart, if racket enters window, using the coordinate of leftmost side foreground point in current frame window as the center of next frame window.Stage4
To stage6 window update mode and stage1 to stage3 on the contrary, repeating no more.
Fig. 5 is the schematic diagram of different disposal stage and its internal submodule in subfunction A.As shown in the figure, each stage
All correspond to several submodules.
Specifically, in stage1, module 501 completes whether ball plays the judgement on the desktop of left side, terminates if having got to
Local exchange；Module 502 completes whether ball is beaten in online judgement, terminates local exchange if having got to；Module 503 complete ball whether left side
The judgement of out-of-bounds terminates local exchange if out-of-bounds；Module 503 complete ball it is whether smooth cross net judgement, if it is smooth cross net if into
Enter stage2.
In stage2, module 505 complete ball whether right side out-of-bounds judgement, terminate local exchange if out-of-bounds；Module 506
Complete ball whether the judgement smoothly to rebound on right side, enter stage3 if smooth rebound.
In stage3, module 507 completes the judgement whether other side receives, if not connecing, club repeatedly bounces, then terminates this
Office；Module 508 completes the judgement whether other side is connected to ball, terminates local exchange if middle ball is not connect；Module 508 complete other side whether
The judgement that ball is returned successfully returns and then enters stage4；
Submodule inside Stage4 to stage6 is similar with the submodule inside stage1 to stage3, repeats no more.
Finally, it is to be noted that, term " comprising ", "comprising" or its any other variant be intended to it is non-exclusive
Property include so that process, method, article or equipment including a series of elements not only include those elements, but also
Further include other elements that are not explicitly listed or further include for this process, method, article or equipment it is intrinsic
Element.
Claims (5)
1. a kind of scoring system of table tennis intelligence score system, which is characterized in that by space vertical where ping-pong table
D1 areas, D2 areas, D3 areas and D4 areas are divided into, the D3 areas and D4 areas are located at the left and right sides in the D2 areas, the D2 areas respectively
Positioned at the centre position of the ball table, the D1 areas are between the D3 areas and D4 areas and positioned at the left and right two in the D2 areas
Side, the D1 areas include being located at the D1 at left and right sides of the D2 areas respectively-L areas and D1-Zone R, the scoring system include step：
Step 401, to image inter-frame difference in D1 areas, then thresholding, enters step 402；
Step 402, it detects and obtains the foreground area in D1_L and D1_R, there is prospect then to enter step 403, otherwise fall back on step
401；
Step 403, according to the position of previous step prospect, the movement window of ball is established, enters step 404；
Step 404, inter-frame difference is carried out to input picture in movement window, subsequently into step 405；
Step 405, if there was only ball, the coordinate up and down of direct coverage motion window calculation ball in movement window；If
There is the interference of racket or human body in movement window, then calculate ball close to the part region of ball in coverage motion window
Coordinate up and down, subsequently into step 406；
Step 406, judge it is to be located at D1_L or D1_R when ball occurs for the first time；For the first time D1_L is appeared in then to enter step
408, on the contrary 407 are entered step, the judgement of local exchange victory or defeat is completed in process steps 407 or step 408, subsequently into step
409；
Step 407, ball moves from right to left, performs following steps and judges：
Stage4, judges whether ball is beaten on the desktop of right side, terminates local exchange if having got to；Judge whether ball is beaten online, if
It has got to and has then terminated local exchange；Judge ball whether right side out-of-bounds, terminate local exchange if out-of-bounds；Judge whether ball is smooth and cross net, if
It smoothly crosses net and then enters stage5,
In Stage5, judge that ball whether in left side out-of-bounds, terminates local exchange if out-of-bounds；Judge whether ball is smoothly anti-in left side
Bullet enters stage6 if smooth rebound,
In Stage6, judge whether other side receives, if not connecing, club repeatedly bounces, then terminates local exchange；Judge whether other side is connected to
Ball terminates local exchange if middle ball is not connect；Judge whether other side returns ball, successfully return, enter step the stage1 in 408；
Step 408, ball moves from left to right, performs following steps and judges：
Stage1, judges whether ball is beaten on the desktop of left side, terminates local exchange if having got to；Judge whether ball is beaten online, if
It has got to and has then terminated local exchange；Judge ball whether left side out-of-bounds, terminate local exchange if out-of-bounds；Judge whether ball is smooth and cross net, if
It smoothly crosses net and then enters stage2,
In stage2, judge that ball whether in right side out-of-bounds, terminates local exchange if out-of-bounds；Judge whether ball is smoothly anti-on right side
Bullet enters stage3 if smooth rebound,
In stage3, judge whether other side receives, if not connecing, club repeatedly bounces, then terminates local exchange；Judge whether other side is connected to
Ball terminates local exchange if middle ball is not connect；Judge whether other side returns ball, successfully return, enter step the stage4 in 407；
Step 409, some foreground point in current frame window come update next frame movement window center, specifically,
In stage1, using the coordinate of rightmost side foreground point in current frame window as the center of next frame window；Stage2 and stage3
In, if racket does not enter window, using the coordinate of rightmost side foreground point in current frame window as the center of next frame window, if ball
It claps and enters window, using the coordinate of leftmost side foreground point in current frame window as the center of next frame window, Stage4 is extremely
The window update mode and stage1 to stage3 of stage6 is opposite.
2. the scoring system of table tennis intelligence score system according to claim 1, it is characterised in that：The step
In 403, ball movement window be with ball movement and movement rectangular image area.
3. the scoring system of table tennis intelligence score system according to claim 2, it is characterised in that：The movement of ball
Window definition is：Centered on ball, the wide a height of 8d of *Ball×10·dBallRectangular image area, wherein dBallFor the table tennis in image
The diameter pixel number of ball.
4. a kind of table tennis intelligence score system using any one of the claim 1-3 scoring systems, feature exists
In including high speed camera, capture card, capturing card driver and score-module, the capture card and capturing card driver are to by high speed phase
The real-time image information of fixation frame per second that machine obtains is exported to score-module, the score-module identification table tennis direction with
And whether motion state terminates and scores to judge local exchange, the motion state include whether to beat on the table, whether beat
It is online, whether out-of-bounds, sportsman receive and whether smooth cross net.
5. table tennis intelligence score system according to claim 4, it is characterised in that：The score-module includes dividing
Do not judge whether to beat during ball side-to-side movement on the table, whether beat it is online, whether out-of-bounds, whether it is smooth cross net, whether
Other side's desktop smoothly rebounds, whether other side receives, whether other side is connected to ball and other side whether the submodule for returning ball.
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| CN107832522A (en) * | 2017-11-03 | 2018-03-23 | 杭州乾博科技有限公司 | The computing system and method for height and angle when a kind of table tennis flies over net |
| CN108549861A (en) * | 2018-04-10 | 2018-09-18 | 百度在线网络技术（北京）有限公司 | Point system and device |
| CN114949825A (en) * | 2020-10-19 | 2022-08-30 | 上海名图软件有限公司 | Automatic scoring system and scoring method for badminton match |
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| CN101458434A (en) * | 2009-01-08 | 2009-06-17 | 浙江大学 | System for precision measuring and predicting table tennis track and system operation method |
| CN103617614A (en) * | 2013-11-26 | 2014-03-05 | 新奥特（北京）视频技术有限公司 | Method and system for determining ping-pong ball drop point data in video images |
| CN104208865A (en) * | 2013-06-03 | 2014-12-17 | 飞比特公司 | Fitness monitoring device with altimeter |
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| US10124240B2 (en) * | 2006-11-14 | 2018-11-13 | Lydia Parvanta | Game table television and projector system, and method for same |
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|---|---|---|---|---|
| CN101458434A (en) * | 2009-01-08 | 2009-06-17 | 浙江大学 | System for precision measuring and predicting table tennis track and system operation method |
| CN104208865A (en) * | 2013-06-03 | 2014-12-17 | 飞比特公司 | Fitness monitoring device with altimeter |
| CN103617614A (en) * | 2013-11-26 | 2014-03-05 | 新奥特（北京）视频技术有限公司 | Method and system for determining ping-pong ball drop point data in video images |
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